The monomer–monomer reaction model 7331b554f6fe5" title="Click to view the MathML source">(A+B→AB) in the linear chain. The B monomer desorbs with probability α.
The model displays a continuous phase transition from an absorbing phase into a reactive steady state.
The critical behavior was studied by mean field theory (site and pair approximations) and Monte Carlo simulations.
The model exhibits the same critical exponents of the directed universality class.